Question

A student pushes against a wall with 20 N of force and the wall does not move. In this situation, the wall exerts
less than 20 N of force
20 N of force
more than 20 N of force
0 N of force

Answer 1

The wall exerts 20 N of force back at the student. Since the wall doesn't move it must exert an EQUAL force in the opposite direction.

Answer 2

In the given situations, The wall exerts 20N of force back at the students.

We have given that,

A student pushes against a wall with 20 N of force and the wall does not move.

We have to determine the situation

What is Newtons 3rd low of motion?

Every action has an equal and opposite reaction.

The wall exerts 20 N of force back at the student.

Therefore, the wall didn't move it must exert an equal force in the opposite direction.

Therefore by using Newton's third law of motion we have the wall exert 20N of a force back at the students.

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